Automatic valve.



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Aummmc VALVE, APPLICATION FILED APR.7|19H ,@57,07. Patented Feb. 19,1918

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Be it known that i, EDWARD Tiflfimem DlsoHEu, u citizen of the United. Stetes, residing at Seutfilee iu the county of 'ngeiid State of lVeshingzou, li inveiite e, new and useful lfmpi'oifeiient Valves, of which die following is e specifin cation.

This invention relates to impreoY-eiueuts in automatic valves and he object of 'i'iis iiiprowfelnenJ is to provide e simple and eiiicient valve tha may be piaceri i' "'Lhe uei and dii supply line of en oil eunei emi that is ,adapted to be opened fue prf sure of the nii and eutonietieeiiy closed by the pressuie of ai spring when the sii? pessure drops below e eeiiein pzfeetemuiued minimum.

ln the type of oil 'burners commonly used urii'eeee lie oil is sprayed inte the combustion diember of the furnaceby means o sii' under pressui'e and lie fiame from the buit/ier ifiii go cui; exiziih guislied if the pressure of 'Ehe ziii (li-ops 'oelow efoeiisin minimum usuiiily shouf; three pounds. This :iiip'essui 's geiieeiiy meintziiued by im eii eoii, g i'essei' which must iuu Constent'i'y in orc-ier n e. steady flame.

if theieiieeiiipife.. ioul 'iie stopped owing to au accident dei ii'bseiieeof sur pies-sure ciiop oe low iie minimum nee ssiiiy te iiminteiii the eme, suoli iame mx be extinguished oufs' the oil Wiii continue to i unil xviii iuu oui; into the hot fire box, amd 'lieieoe gggzisiefl.s end perhaps pioduee :in exriiosiou that will start e, desti'uetive Ere. oi wi'eciz the furnace in the base 1e i; ef buiiiliug.

This veive is so [Tu a iewhen the air pressure felis beiow e Cesi-aiu prede tel'miued minimum the oil 0i: fusi feed Wili. be .automatically shut eil.

The invention consists in he novel eouf struction, adepteieu and combination. ei' parts of :i valve by 'which iiie above objecs are attaiieci.

In the accompanying ciifewiiigs, Figure l is e View in the iengiiaifiiziei section oi e valve cousi'ueecl iii eeeomiiiuee wih this in ventionertain pars being shown in eleve,-

ion and the valves being eiseci; Fig. Q is e simiiez' View she-wing the selves open, mii Fig. 3 is :i Seciouai View en oioken line 3, 3 of Fic. l.

Rei-,effing to the drawings tixi'ouglieuob:i in.

` wi'iicii like reference numerals indicate like pejfs, @ie numerals 5 and 6 indicate two .valve easing members thai. are adapted to be screwed Logethei as at 'Zto form e valve eesing. v

The member 5 is p'ovided with fue?. or oil inlet and outlet pipes 8 and 9 respectively, aud me member (i is proviied with air inlet and ou'iiet pipes 1G end-1l respeciveiy.

When the valve is in use, the pipe 8 is connected with ai source of suppiy of fuel, lie pipe i0 is connected with a source of si'ippy o? eoizipressed air and the pipes 9 und exteml to and are connected with en oil burner' ihm; muy be disposed within the combustion chamber of a furnace.

The vulve member 6 is provided Wizh an exiaj bere, l2, and is edaped to be closed sie its outer end by a plug,l3, that screws fightiy against zi disk 14.

The Lisl( le is providecl with peripheral lugs. lo', that fit within suitabie recesses, and. prevent the disk from. turning when the pieni 13 is 'sei-owed against, it.

The wim i'uembei' 5 is provided meer 'e iiiiiei eul with ai large aciel bore and bof is smellei end with successive smaller bores l?, l5 und 19 respectively. i

2G a that is insertedL between the two ends of she members 5 and 6 where they ero screweei together and serves as s, periltiou weil between the air and oil compartments, and es :i bearing for an axially disposed valve stem 21, the vaive stem 21 being {i'oum'l se hat it will make im ein tight t in fhe beuijing in. the partition disk 20.

The vidi* stem 2l is provided oie eue end. with e eyiiudrical vai've pision 22, dispese.' withiii the bore i2, end edepfzedie l' iengtiiwise, hei-eof so open emi. ggassege'miy1 to the eii" eutle pipe ik is a compression spe-ing that is interu posed between the disk 14 and tie end of the waive pisoii 22 to uer'meiy Mge fthe vaive piston im@ e closed position.

The enof iie veive siem 21, Within the valve casing 5, is piovicied with e valve pis# on consisting of e eyiimlrical portion, 24.-, 'haia wifhin che bore l, auotlier'smeler cyiini'ioel poiiiou that. is Within ihe more fineher stiil smaller eyiindricai poijion time fits wiihin the bore 18.

The ends oi' the vulve eiemenzs 24., 25 a Zi eee eflsied to engage with Shouiders 28 and 29 ifespeetively :it the ends of the' nos 3G 23 maybe made just strong enough to close through the l shown in Fig. 2 against the pressure ofthe -10 sprin 23, and will open both the air as sage ormed by the pipes l0 and ,11, an tho oil'passage formed.' by the pipes 8 and iig-- through th,- valve to the pipe 9, as indicated by arrows. vi' As soon as the pressureof the air drops so of the'spring v thereby permitting oil toy flow that it is less than the pressure 23, the spring ywill close vthe Valve piston, thus shuttin oli the fuel supplyvwhen there is notenoug airt'o maintain a flame.

The position of the 'pipe' 10 is offset with respectto the position f the pipe 11, so that( when the piston valve member 22 is in such a, position as to. close the'air outlet .to 'the pipe 11, the-air inlet will be open to admit iston valve 22'.

arr in front of the l p The spring may e made relatively light so that it will be operatedbyalow pressure,- of air; for instance vif the flame of the burner y will go out when the air pressure falls below three pounds per square inch thenthe -spring the valves against' a three pound air .pressure. f v

It. is obvious that changesjin the precise form of construction of this device may be resortedto vWithin the scope of the appended claims.4 What I claim and desire to' protect by Letters Patent is:A f

1. The combination With a conduit for' liquid fuel and a conduit for 'air under pressure of a two partl valve casing adapted-to be connected with both of said conduits, valve pistons 'Within said valve casing, and movable simultaneously, said valve pistons being 'adapted to be moved into an open po- 4air from said `air conduit to permit fuel and air to' pass therethrough, and a spring to vclose said valve pistons when the pressure of said air drops below a predetermined minimum.

e 2. A valveeof the class described comprising a casing having an internal recess divided into two cylindrical compartments by a partition Wall, a valve' stern slidable through said partition Wall, a valver iston secured on each end of said valve stem, fuel inlet and outlet pipesconnected with one of said compartments, air inlet and'outle't pipes connected with the other of said comparti .into a closed position, pipes connected with said last named com'- i -partmenhand air inlet and outlet pipes conf l u nected at points otlset with respect to'each -31 day of March, 1917.

- open position by the pressure of said air when said pressure reaches a certain predetermined amount.

3. A valve of the class described comprising a valve casing having a partition wall 10 that divides it -into two compartments one of said compartments being of constant cylindrical'diameter and the other of said com-p partments comprising a plurality of cylind-rical bores of successively reduced di- 75 ameters :troni-inner to outer end thereof a valve piston ofv constant, diameter movable Within said first named compartment, a valve y piston A'of successively reduced diameters movable Within Asaid last named compar't- 80 ment, means connecting said-*two valve pistons, a spring to urge saiil'valve pistons fuel inletandy outlet other with said first named compartment'. p

4.k A valve ofthe class described comprising a two part valve casing one of said arts 1 having a cylindrical borelof'constant iarn- 90 eter and the other of said parts having a ypluralityof cylindrical bores of successively reduced ldiameters fromv inner to outer end thereof, a partition plate interposed-between' the two parts of'said valve casing to divide' 95 said valvecasing into two separate compartments, air inlet and outlet pipes'connected with said bore of constant diameter at pointsA offset with respect to'each other,fuel inlet and outlet pipes connected` with said bores of successively sdliceddiameters, an axially .disposed valve stem slidable in a bearing in' said partition plate, a cylindrical valve on one end of said valve stem and adapted to fit saidicylindrical bore of'coustant diameter, 105 a valve of :successivelyV different cylindrical diameters on the opposite end of said valve stem and adaptedto t-v within said cylindrical bores ofy successively reduced diam eters and avspring for normally holding-said 110 valves in a closed position said valves-beingA y adapted to be' opened by the pressure yof air from said air'conduit lwhen said pressure reaches a predetermined minimum. Signed 'by me atSeattle, Washington, this 115 EDWARD WILLIAM DISCHER.

Witnesses:

E. B. HERALD,

F. C. MATHENY.' 

